trillion

noun

tril·​lion ˈtri(l)-yən How to pronounce trillion (audio)
Synonyms of trillionnext
1
: a number equal to 1,000 times one billion see Table of Numbers
2
: an indeterminately large number
a trillion mosquitoes out tonight
trillion adjective
trillionth adjective or noun

Examples of trillion in a Sentence

Recent Examples on the Web
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When analyzing the trillions of queries made every year, incredible patterns emerge. Simon Rogers, CNBC, 6 May 2026 This will be recovered along with the trillions of dollars stolen and wasted in the last five to 10 years. Kaitlyn Schallhorn, Oc Register, 4 May 2026 While most of that money will go to families, trillions will still flow to organizations and institutions. Ed Smith-Lewis, Fortune, 2 May 2026 As gut health becomes a growing focus in the wellness world, experts point to the microbiome — the trillions of bacteria living in the digestive tract — as a key player in everything from digestion to immunity. Deirdre Bardolf, FOXNews.com, 27 Apr. 2026 See All Example Sentences for trillion

Word History

Etymology

French, from tri- + -illion (as in million)

First Known Use

1745, in the meaning defined at sense 2

Time Traveler
The first known use of trillion was in 1745

Browse Nearby Words

Cite this Entry

“Trillion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trillion. Accessed 7 May. 2026.

Kids Definition

trillion

noun
tril·​lion ˈtril-yən How to pronounce trillion (audio)
1
: a number equal to 1,000 times one billion see number
2
: a very large number
a trillion mosquitoes out tonight
trillion adjective
trillionth adjective
trillionth noun

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